MESON Chess Problem Database

Problem Display
PID: 108909 (8/5QN1/1n5p/1B2P1pK/Rr1Pk2p/3p4/5PpB/1N2n3 w - - 0 1)

Lobusov, Andrey Jakovlevic

Revista Romana de Sah, 1984

8/5QN1/1n5p/1B2P1pK/Rr1Pk2p/3p4/5PpB/1N2n3

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.Sc3#
    • 1...Rb3
      • 2.Sd2#
    • 1...Rxd4
      • 2.Sd2#
      • 2.Sc3#
    • 1...Rxb5
      • 2.Sd2#
      • 2.Sc3#
  • Tries
    • 1.Se6?
      • threat
        • 2.Sc3#
      • 1...Kd5
        • 2.Sc3#
      • 1...Rxb1
        • 2.Sc5#
      • 1...Sxa4
        • 2.Bc6#
      • 1...Rb3
        • 2.Sc5#
      • 1...Sd5
        • 2.Sd2#
      • 1...Rc4!
    • 1.Bc6+?
      • 1...Sd5
        • 2.Qxd5#
      • 1...Kxd4!
    • 1.Rxb4?
      • threat
        • 2.Sd2#
        • 2.Sc3#
      • 1...Sf3
        • 2.Sc3#
      • 1...Sa4
        • 2.Sd2#
        • 2.Bc6#
        • 2.Qb7#
        • 2.d5#
      • 1...Sd5
        • 2.Sd2#
        • 2.Qf5#
      • 1...d2
        • 2.Sxd2#
        • 2.Sc3#
      • 1...Sc4!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Sc3#
      • 1...gxf4!
    • 1.Qb7+?
      • 1...Kxd4
        • 2.Se6#
      • 1...Sd5!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sd2#
      • 1...Kf3
        • 2.Sg3#
      • 1...Rxb1
        • 2.Sd6#
      • 1...Rb2
        • 2.Sd6#
      • 1...Sf3
        • 2.Sc3#
      • 1...Sc4
        • 2.Bc6#
      • 1...d2
        • 2.Sxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(d);::S(A)
  • Tries
    • Try
      • S(J);
      • Threat
        • S(A)
      • Vars
        • K(e);S_FLIGHT::S(A)
        • R(d);XS(A)::S(J)
        • S(h);N_GUARD,XR(D)::B(F)
        • R(d);::S(J)
        • S(h);SBLOCK::S(A)
      • Refutation
        • R(d);
    • Try
      • B(F);CHECK
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::QAB1(I),XS(h)
      • Refutation
        • K(e);P-FLIGHT,P_SPINR(d),XP(E)
    • Try
      • R(D);XR(d)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::S(A)
      • Refutation
        • S(h);
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);S_FLIGHT::S(A)
      • Refutation
        • P(g);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINR(d),XP(E)::S(J)
      • Refutation
        • S(h);P_SPINS(h)
  • Actual
    • S(J);
    • Threat
      • S(A)
    • Vars
      • K(e);S_FLIGHT::QAR(I)+S(J)
      • R(d);XS(A)::S(J)
      • R(d);::S(J)
      • S(a);SBLOCK::S(A)
      • S(h);N_GUARD::B(F)
      • P(c);::S(A),XP(c)
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